#button-icon .card .card-body .btn {
  display: block;
  width: 200px;
  height: 48px;
  line-height: 48px;
  background-color: blue;
  border-radius: 4px;
  text-align: center;
  color: #fff;
  font-weight: 700;
}
#button-icon .card .card-body .btn-docu:before {
  content: "\0000a0";
  display: inline-flex;
  height: 24px;
  width: 24px;
  line-height: 24px;
  margin: 0px 10px 0px 0px;
  position: relative;
  top: 0px;
  left: 0px;
  background: url(https://stackdiary.com/docu.svg) no-repeat left center transparent;
  background-size: 100% 100%;
}
#first .content-section p:first-of-type::first-letter {
  color: red;
  float: left;
  font-size: 4rem;
  line-height: 4vw;
  padding-right: 8px;
  /* border: 0.25em double; */
}
#menu .css-dynamic-sidebar {
  overflow: hidden;
  position: relative;
  height: 15em;
  max-width: 15em;
  margin: auto;
}
#menu .site-content {
  margin: auto;
}
#menu nav {
  display: flex;
  flex-direction: column;
  position: absolute;
  right: 100%;
  padding: 1em;
  background-color: #f3f3f3;
  transform: translateX(1em);
  transition: 0.2s transform;
}
#menu nav:hover,
#menu nav:focus-within {
  transform: translateX(100%);
}
#menu a {
  white-space: pre;
  color: black;
}
#menu p {
  font-size: 2em;
  font-family: monospace;
  text-align: center;
}
#typing .typing {
  height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
}
#typing .typing-effect {
  width: 22ch;
  white-space: nowrap;
  overflow: hidden;
  border-right: 0.1875rem solid;
  font-family: monospace;
  font-size: 2em;
  animation: typing 10s steps(22), effect 0.5s step-end infinite alternate;
}
@keyframes typing {
  from {
    width: 0;
  }
}
@keyframes effect {
  50% {
    border-color: transparent;
  }
}
#box-shadow .transparent-shadow {
  height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
}
#box-shadow .margin-right {
  margin-right: 2em;
}
#box-shadow .margin-bottom {
  margin-bottom: 1em;
}
#box-shadow .align-center {
  text-align: center;
}
#box-shadow .box-shadow {
  box-shadow: 0.125rem 0.25rem 0.5rem #3723a1;
}
#box-shadow .drop-shadow {
  filter: drop-shadow(0.125rem 0.25rem 0.5rem #3723a1);
}
#custom-cursor .custom-cursor {
  display: flex;
  height: 80vh;
  align-items: center;
  justify-content: center;
  background: #f3f3f3;
  padding: 0 0.625rem;
}
#custom-cursor .card {
  width: 12.5rem;
  height: 12.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #d29a5a;
  margin-right: 0.625rem;
  color: #fff;
  font-size: 1.4em;
  text-align: center;
}
#custom-cursor .card-image-cursor {
  background-color: #d11a5a;
  cursor: url("https://p1-juejin.byteimg.com/tos-cn-i-k3u1fbpfcp/0ac1d8cb2b1b46a384e986a7461df26a~tplv-k3u1fbpfcp-watermark.image"), auto;
}
#custom-cursor .card-emoji-cursor {
  background-color: #d29b22;
  cursor: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg'  width='48' height='48' viewport='0 0 100 100' style='fill:black;font-size:1.5rem;'><text y='50%'>🚀</text></svg>"), auto;
}
#tooltip .tooltip {
  position: relative;
  border-bottom: 0.0625rem dotted black;
}
#tooltip .tooltip:before {
  content: attr(tooltip-data);
  position: absolute;
  width: 15.625rem;
  background-color: #efba93;
  color: #fff;
  text-align: center;
  padding: 0.9375rem;
  line-height: 1.1;
  border-radius: 0.3125rem;
  z-index: 1;
  opacity: 0;
  transition: opacity 0.5s;
  bottom: 125%;
  left: 50%;
  margin-left: -3.75rem;
  font-size: 0.7em;
  visibility: hidden;
}
#tooltip .tooltip:after {
  content: "";
  position: absolute;
  bottom: 75%;
  left: 50%;
  margin-left: -0.3125rem;
  border-width: 0.3125rem;
  border-style: solid;
  opacity: 0;
  transition: opacity 0.5s;
  border-color: #000 transparent transparent transparent;
  visibility: hidden;
}
#tooltip .tooltip:hover:before,
#tooltip .tooltip:hover:after {
  opacity: 1;
  visibility: visible;
}
#todo .checklist {
  padding: 50px;
  position: relative;
  background: #043b3e;
  border-top: 50px solid #03a2f4;
}
#todo .checklist h2 {
  color: #f3f3f3;
  font-size: 25px;
  padding: 10px 0;
  margin-left: 10px;
  display: inline-block;
  border-bottom: 4px solid #f3f3f3;
}
#todo .checklist label {
  position: relative;
  display: block;
  margin: 40px 0;
  color: #fff;
  font-size: 24px;
  cursor: pointer;
}
#todo .checklist input[type="checkbox"] {
  -webkit-appearance: none;
}
#todo .checklist i {
  position: absolute;
  top: 2px;
  display: inline-block;
  width: 25px;
  height: 25px;
  border: 2px solid #fff;
}
#todo .checklist input[type="checkbox"]:checked ~ i {
  top: 1px;
  height: 15px;
  width: 25px;
  border-top: none;
  border-right: none;
  transform: rotate(-45deg);
}
#todo .checklist span {
  position: relative;
  left: 40px;
  transition: 0.5s;
}
#todo .checklist span:before {
  content: "";
  position: absolute;
  top: 50%;
  left: 0;
  width: 100%;
  height: 1px;
  background: #fff;
  transform: translateY(-50%) scaleX(0);
  transform-origin: left;
  transition: transform 0.5s;
}
#todo .checklist input[type="checkbox"]:checked ~ span:before {
  transform: translateY(-50%) scaleX(1);
  transform-origin: right;
  transition: transform 0.5s;
}
#todo .checklist input[type="checkbox"]:checked ~ span {
  color: #154e6b;
}
#judge {
  /* this query will select the b element within a heading and change its color. */
}
#judge :where(h2, h3, h4) > b {
  color: blue;
}
#judge :is(h2):where(.content-title) {
  text-transform: uppercase;
  font-size: 30px;
}
#tab {
  /* .tab-content can be styled as you like */
}
#tab main {
  max-width: 400px;
  margin: 0 auto;
}
#tab p {
  text-align: justify;
  font-family: monospace;
  font-size: 13px;
}
#tab summary {
  font-size: 1rem;
  font-weight: 600;
  background-color: #f3f3f3;
  color: #000;
  padding: 1rem;
  margin-bottom: 1rem;
  outline: none;
  border-radius: 0.25rem;
  cursor: pointer;
  position: relative;
}
#tab details[open] summary ~ * {
  animation: sweep 0.5s ease-in-out;
}
@keyframes sweep {
  0% {
    opacity: 0;
    margin-top: -10px;
  }
  100% {
    opacity: 1;
    margin-top: 0px;
  }
}
#tab details > summary::after {
  position: absolute;
  content: "+";
  right: 20px;
}
#tab details[open] > summary::after {
  position: absolute;
  content: "-";
  right: 20px;
}
#tab details > summary::-webkit-details-marker {
  display: none;
}
